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・All specifications are subject to change without notice.
Instruction Manual
HWS
HWS HD
HWS ME
HWS-P
HWS
300P, 600P
4. Functions and Precautions
Input Voltage Range
Input voltage range is single phase 85 - 265VAC (47 -
63Hz) or 120 - 330VDC. Input voltage, which is out of
specifi cation, may cause unit damage. Rated input voltage
for safety standard application is 100 - 240VAC(50/60Hz).
Output Voltage Range
Output voltage is set to the rated voltage value at
shipment. V.ADJ trimmer on the front panel side is used to
adjust the output voltage within the range specifi ed.
Output voltage range is within −20 % - +10 % of rated
output voltage.
To turn the trimmer clockwise, the output voltage will be
increased. Take note when the output voltage is increased
excessively, over voltage protection (OVP) function may
trigger and output voltage will be shut down.
When output voltage increased, average output power and
peak output power have to use less than specifi cation.
Over Voltage Protection (OVP)
The OVP function (Inverter shutdown method, manual reset
type) is provided. OVP function operates within 115-135%
of the rated output voltage value, and the output will be
shut down when OVP function trigger. To reset OVP,
remove the input of power supply for a few minutes, and
then re-input. Or, use CNT reset (remote ON/OFF : OFF to
ON). OVP value is fi xed and not to be adjusted externally.
Never apply more than rated output voltage to output
terminal, which may lead damage to power supply. In the
case of inductive load, use decoupling diode at output line.
Delay Shut Down
This product have a delay shut down function provided
to protect power supply and equipment at the time of the
consecutive peak current. When the product operate peak
current for more than 5 seconds, delay shut down function
operates and the output will be shut down.
To reset delay shut down, remove the input of power
supply for a few minutes, and then re-input. Or, use CNT
reset ( remote ON/OFF : OFF to ON).
Delay Shut Down Time value is fixed and not to be
adjusted externally.
Use it about the peak electricity in specifications range.
The details see at 4-14. Output Peak Power .
Over Current Protection (OCP)
The OCP function (manual reset type) is provided. Output
will be shut down in condition over current or output short-
circuit.
To reset OCP, remove the input of power supply for a few
minutes, and then re-input. Or, use CNT reset ( remote
ON/OFF : OFF to ON).
Also avoid over current condition or output short-circuit.
Otherwise the product will be damage.
OCP value is fi xed and not to be adjusted externally.
Over Temperature Protection (OTP)
The OTP function (manual reset type) is provided. When
ambient or internal temperature rises abnormally, OTP
function operates and output will be shut down. After shut
down, remove the input and cool it down to reset OTP.
Then re-input.
Or, use CNT reset ( remote ON/OFF : OFF to ON).
Low Output Detection Circuit (PF)
Low output voltage detection circuit is provided. Power Fail
(PF) signal will turn High level to indicate the abnormal
status when the output voltage becomes within 65 ˜ 80%
of rated value caused by either the drop or brownout of the
input voltage or OCP, OVP, Delay Shut Down and OTP
etc function operation. When the built-in FAN motor of this
power supply unit stops, PF signal will turn to H . The
PF signal is isolated from input and output by a photo-
coupler. It uses the open collector method shown in below.
Remote ON/OFF Control
Remote ON/OFF control is provided.
Using this function, output on/off is allowed to control
without input voltage on/off. The output is turned to ON
when TOG and CNT terminals are shorted, and the output
is turned to OFF when these terminals are opened. When
the function is not used, connect TOG and CNT terminals.
The standards for this function are as follows. TOG
terminal is return for CNT terminal.
(1) TTL compatible. The maximum input voltage to CNT
terminal is 12V, and the maximum allowable reverse
voltage is ‒1.0V. The sink current for CNT terminal is 3.5mA.
(2) A switch and relay or a transistor can be used as ON/
OFF switch.
(3) Remote ON/OFF control circuit is isolated from
the input and output by a photo-coupler and can be
controlled regardless of the output potential (+ or -).
Connect TOG terminal to ground of control signal.
The mode of control
CNT Level for TOG Terminal
Output
Built-in Fan
Short or L (0V - 0.8V)
ON
Rotate
Open or H (2.4V - 12V)
OFF
Stop
PF
TOG
V
CE
max=30V
I
C
max=20mA
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